77440002 has 8 divisors (see below), whose sum is σ = 154880016. Its totient is φ = 25813332.

The previous prime is 77439997. The next prime is 77440043. The reversal of 77440002 is 20004477.

It is a sphenic number, since it is the product of 3 distinct primes.

77440002 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6453328 + ... + 6453339.

It is an arithmetic number, because the mean of its divisors is an integer number (19360002).

Almost surely, 2^77440002 is an apocalyptic number.

77440002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77440002 is a wasteful number, since it uses less digits than its factorization.

77440002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12906672.

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 77440002 is about 8800.0001136364. Note that the first 3 decimals coincide. The cubic root of 77440002 is about 426.2408983761.

Adding to 77440002 its reverse (20004477), we get a palindrome (97444479).

The spelling of 77440002 in words is "seventy-seven million, four hundred forty thousand, two".